Subaru Impreza 3 / Impreza WRX / Impreza WRX STI. Service manual — part 772

IM(diag)-23

Diagnostic Procedure with Diagnostic Trouble Code (DTC)

IMMOBILIZER (DIAGNOSTICS)

F: DTC B1576 EGI CONTROL MODULE EEPROM

DTC DETECTING CONDITION:

• ECM malfunctioning

• Inaccessible ROM in ECM during key registration.

Step

Check

Yes

No

1

PERFORM IGNITION KEY REGISTRATION.
Perform registration to all keys used for the vehi-
cle. Refer to the “REGISTRATION MANUAL
FOR IMMOBILIZER”.

Is registration of all keys com-
plete?

Using the all regis-
tered keys, make
sure that the
engine can start.
This completes the
work.

Go to step

2.

2

PERFORM IGNITION KEY REGISTRATION.
Perform registration to all keys used for the vehi-
cle. Refer to the “REGISTRATION MANUAL
FOR IMMOBILIZER”.

Is registration of all keys com-
plete?

Using the all regis-
tered keys, make
sure that the
engine can start.
This completes the
work.

Go to step

3.

3

PERFORM IGNITION KEY REGISTRATION.
Perform registration to all keys used for the vehi-
cle. Refer to the “REGISTRATION MANUAL
FOR IMMOBILIZER”.

Is registration of all keys com-
plete?

Using the all regis-
tered keys, make
sure that the
engine can start.
This completes the
work.

Replace the ECM.
<Ref. to FU(STI)-
59, Engine Control
Module (ECM).>
Execute the regis-
tration procedure
next. Refer to the
“REGISTRATION
MANUAL FOR
IMMOBILIZER”.

IM(diag)-24

Diagnostic Procedure with Diagnostic Trouble Code (DTC)

IMMOBILIZER (DIAGNOSTICS)

G: DTC B1577 IMM CONTROL MODULE EEPROM

DTC DETECTING CONDITION:

• Body integrated unit malfunctioning

• Failed to access the ROM inside the body integrated unit.

Step

Check

Yes

No

1

PERFORM IGNITION KEY REGISTRATION.
Perform registration to all keys used for the vehi-
cle. Refer to the “REGISTRATION MANUAL
FOR IMMOBILIZER”.

Is registration of all keys com-
plete?

Using the all regis-
tered keys, make
sure that the
engine can start.
This completes the
work.

Go to step

2.

2

PERFORM IGNITION KEY REGISTRATION.
Perform registration to all keys used for the vehi-
cle. Refer to the “REGISTRATION MANUAL
FOR IMMOBILIZER”.

Is registration of all keys com-
plete?

Using the all regis-
tered keys, make
sure that the
engine can start.
This completes the
work.

Go to step

3.

3

PERFORM IGNITION KEY REGISTRATION.
Perform registration to all keys used for the vehi-
cle. Refer to the “REGISTRATION MANUAL
FOR IMMOBILIZER”.

Is registration of all keys com-
plete?

Using the all regis-
tered keys, make
sure that the
engine can start.
This completes the
work.

Replace the body
integrated unit.
<Ref. to SL-48,
Body Integrated
Unit.> Register all
ignition keys (tran-
sponders). Refer to
the “REGISTRA-
TION MANUAL
FOR IMMOBI-
LIZER”.

IM(diag)-25

Diagnostic Procedure with Diagnostic Trouble Code (DTC)

IMMOBILIZER (DIAGNOSTICS)

H: DTC B1578 METER FAILURE

DTC DETECTING CONDITION:

• Reference code incompatibility between combination meter and body integrated unit

• Communication failure between body integrated unit and ECM

NOTE:

• When the combination meter has been replaced, be sure to perform the registration procedure of immo-

bilizer.

• When the combination meter and body integrated unit are replaced at a time, the registration can not be

completed. In this case, it is necessary to rewrite the ID into the body integrated unit.

I: DTC B1401 M COLLATION NG

NOTE:

For diagnostic procedures, refer to DTC B1578 “METER FAILURE”. <Ref. to IM(diag)-25, DTC B1578

METER FAILURE, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>

J: DTC B1402 IMMOBILIZER KEY COLLATION NG

NOTE:

For diagnostic procedures, refer to the following items.

• DTC B1575 “INCORRECT IMMOBILIZER KEY” <Ref. to IM(diag)-22, DTC B1575 INCORRECT IMMO-

BILIZER KEY, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>

• DTC B1570 “ANTENNA” <Ref. to IM(diag)-15, DTC B1570 ANTENNA, Diagnostic Procedure with Di-

agnostic Trouble Code (DTC).>

• DTC B1574 “KEY COMMUNICATION FAILURE” <Ref. to IM(diag)-21, DTC B1574 KEY COMMUNICA-

TION FAILURE, Diagnostic Procedure with Diagnostic Trouble Code (DTC).>

K: DTC B1403 E/G REQUEST NG

NOTE:

For diagnostic procedures, refer to DTC B1572 “IMM CIRCUIT FAILURE (EXCEPT ANTENNA CIRCUIT)”.

<Ref. to IM(diag)-18, DTC B1572 IMM CIRCUIT FAILURE (EXCEPT ANTENNA CIRCUIT), Diagnostic Pro-

cedure with Diagnostic Trouble Code (DTC).>

Step

Check

Yes

No

1

CHECK DTC.
Read the DTC of body integrated unit using
Subaru Select Monitor.

Is DTC B1401 detected?

Go to step

2.

<Ref. to IM(diag)-
18, DTC B1572
IMM CIRCUIT
FAILURE
(EXCEPT
ANTENNA CIR-
CUIT), Diagnostic
Procedure with
Diagnostic Trouble
Code (DTC).>

2

CHECK LAN COMMUNICATION SYSTEM.
Inspect LAN communication system. <Ref. to
LAN(diag)-2, Basic Diagnostic Procedure.>

Is DTC U1300, U1301, U1302,
B1100 or B1101 of the body
integrated unit displayed?

Perform the diag-
nosis according to
the DTC. <Ref. to
LAN(diag)-32, List
of Diagnostic Trou-
ble Code (DTC).>

Go to step

3.

3

CHECK COMBINATION METER.
1) Perform the registration of immobilizer.
Refer to the “REGISTRATION MANUAL FOR
IMMOBILIZER”.
2) Start the engine.

Does the engine start?

System is normal. Replace the com-

bination meter.
<Ref. to IDI-16,
REMOVAL, Com-
bination Meter.>

IM(diag)-26

Diagnostic Procedure with Diagnostic Trouble Code (DTC)

IMMOBILIZER (DIAGNOSTICS)